Late period after going off birth control

So. I started birth control beginning of September (between periods, dumb time I know) and then I was reacting bad to it so I went off after a month and like 3 days. Doctor had no other pill suggestions so I’m getting an iud next week. But have been ‘unprotected’ since beginning of October.

I got my period in September when it was supposed to come beforr I started the pill. But it lasted 8 days (normally lasts no longer than 5) but the last few days it was like watery blood which has never happened.

My period was supposed to come 4 days ago (28 days from when it should have ended) or 1 day late if it was 28 days since it actually ended (day 8)

Anyway, is this normal? Should I be concerned that I haven’t got my period or is it just cause of how I messed up my cycle with birth control.